-83.64% is the change from 966 to 158
Calculation steps:
[( 158 - 966 ) ÷ 966] x 100 = -83.64%
Formula
Percentage change = [(158 - 966) / 966] x 100
Subtract the new number by the original number
158 - 966 = -808
-808 ÷ 966 = -0.8364389233954451
-0.8364389233954451 x 100 = -83.64%